CN114392517A - A safety control system suitable for oil storage tank valve - Google Patents

Abstract

The invention relates to a safety control system suitable for oil storage tank valves, comprising a manual-automatic integrated valve, a micro-program controller, a smoke alarm, a non-contact thermometer, a combustible gas detector, an alarm, and an activated carbon adsorption device. Overpressure relief valve, photovoltaic solar panel, solar controller, storage battery, fire-fighting foam tank, transfer pump, fire-fighting liquid spray pipe with sprinkler. Generally, the valve opening and closing is automatically controlled by the manual and automatic integrated valve. If the power failure in the tank area, the manual control is used, and the battery is used for power supply only in emergency situations. If a smoke alarm or a non-contact thermometer or a combustible gas detector detects a fire signal, the microcontroller will automatically control the valve to close and issue an alarm. If the three sensor indicators do not drop after the valve is closed, the fire-fighting liquid spray pipe will automatically spray fire-fighting liquid to cool down the surrounding of the tank. The invention provides a safety control system with simple operation, intelligence and convenient maintenance and management.

Description

A safety control system suitable for oil storage tank valve

technical field

The invention belongs to the technical field of oil tank safety equipment, and in particular relates to a safety control system suitable for oil storage tank valves.

Background technique

A large number of oil tanks are often distributed in the storage tank area of petrochemical products, and various pipelines are densely distributed, and the overall capacity of the storage tanks is large. After a storage tank fire occurs, it is very easy to cause a fire in the surrounding storage tanks. At the same time, the explosion caused by it also has the characteristics of continuous, not a one-time explosion. However, due to different combustion conditions, oil tank fires may occur in one or more of the following situations: first explosion and then combustion, first combustion and then explosion, local stable combustion without explosion, and no longer burning after explosion. Among them, the oil tank fire form of first combustion and then explosion is more common. Under the influence of the high temperature of the fire, the pressure in the oil tank will rise rapidly, and it is easy to cause physical explosion due to excessive pressure. The explosion would spread the heat to nearby oil tanks, causing a chain explosion. If the storage tank is in a dangerous situation such as fire and explosion, it will not only cause huge property losses, but also cause casualties and huge harm. In addition, the flame temperature of the storage tank fire is relatively high, which can theoretically reach 1400 °C, even the tank wall temperature can reach more than 1000 °C, and a large amount of oil vapor will be generated. Such gases are highly toxic and greatly affect Difficulty in fire rescue. If the accident can be detected and dealt with in time in the early stage of the accident, the harm caused by the accident can be effectively reduced.

The invention aims to monitor various indicators of the tank farm through a set of safety control system, find abnormal situations in time and remind the staff, and at the same time, it can be processed automatically. If a fire occurs accidentally, the valve of the oil tank can be closed in time during the fire phase, and the fire fighting liquid can be sprayed to cool down, so as to avoid the deterioration of the situation, prevent the oil tank from exploding after fire, and reduce the loss of personnel and property.

SUMMARY OF THE INVENTION

The invention provides a safety control system suitable for the valve of the oil storage tank to monitor various data indicators of the storage tank in real time, remind the staff in the early stage of abnormal data or an accident, and automatically deal with it, so as to avoid the deterioration of the situation.

In order to achieve the above purpose, the present invention provides the following technical solutions: a safety control system suitable for oil storage tank valves, including a hand-automatic integrated valve located on the inlet and outlet pipes of the storage tank, and a valve for monitoring and controlling the opening and closing state of the valve. safety control system. The safety control system includes a microprogram controller, an alarm, a smoke alarm, a non-contact thermometer, and a combustible gas detector. Wherein, the smoke alarm, the non-contact thermometer and the combustible gas detector are respectively connected with the input end of the micro-program controller, and the hand-automatic integrated valve and the alarm are connected with the output end of the micro-program controller.

On the basis of the above equipment, the safety control system is also equipped with an overpressure relief valve with an activated carbon adsorption layer, which is installed on the top of the oil storage tank. When the pressure in the tank exceeds the normal index due to equipment failure or fire, the air release valve is automatically exhausted through the spring. Lift up and shrink the spring. When the position of the sealing plate is higher than the exhaust port, the exhaust starts. After the gas is discharged, the pressure continues to decrease, and the position of the sealing plate gradually decreases. When the position of the sealing plate is lower than the exhaust port, re-seal . In addition, the air outlet of the air release valve is also equipped with an activated carbon adsorption layer, which absorbs the oil vapor that may be volatilized due to factors such as high temperature, and avoids subsequent combustion or explosion due to excessive oil vapor concentration. The adsorption layer is installed at the air release port. Easy to replace.

On the basis of the above equipment, the safety control system also includes an alarm, which is connected to the output end of the micro-program controller. When the safety control system detects that some data indicators of the storage tank are abnormal, the alarm sounds to remind the staff to pay attention to the investigation.

On the basis of the above equipment, the safety control system is also equipped with a fire-proof and explosion-proof photovoltaic solar panel, a solar controller and a battery. The photovoltaic solar panel is independently arranged above the storage tank and is connected to the battery through the solar controller. After absorbing sunlight , converts solar radiation energy into electrical energy, and stores it in a storage battery through a solar controller as an emergency backup power supply, and the storage battery is connected with a micro-program controller.

On the basis of the above equipment, the safety control system is also equipped with a small single-tank fire protection system, which specifically includes a fire-fighting foam tank, a transfer pump, a fire-fighting liquid spray pipe with a sprinkler, and the transfer pump is connected to a micro-program controller. connected to the output. Although oil depots are all equipped with fire protection systems, the purpose of setting up a small single-tank fire protection system is to quickly and accurately use foam liquid to automatically extinguish fires in the event of a fire, reduce the temperature around the tank, save time and improve efficiency.

The valve and its safety control system provided by the invention can use the manual and automatic integrated valve to control the opening and closing of the inlet and outlet pipes of the storage tank under normal circumstances. When a fire occurs, the smoke alarm detects a large fire, or the non-contact thermometer When it is detected that the temperature around the storage tank is too high, or the combustible gas detector detects that the concentration of combustible gas around the storage tank is about to reach the lower limit of explosion, the abnormal information is transmitted to the micro-program controller, and the controller automatically controls the valve to close the inlet and outlet pipes of the storage tank. Spray fire-fighting liquid to cool the tank, and take measures from the early stage of the accident as much as possible to avoid further deterioration of the situation, resulting in property and even casualties. If the fire expands, the tank farm cannot supply power. At this time, the micro-program controller can supply power through the battery to automatically close the tank valve to reduce losses.

The safety control system suitable for the oil storage tank valve provided by the invention is easy and simple to operate under normal conditions, and the solution measures in the case of normal power outage and accidental power outage are envisaged. The micro-program controller automatically sends out instructions, the equipment provided by the invention has a simple structure, clear work flow, convenient maintenance and management, can realize remote operation, saves manpower, reduces production hidden dangers as much as possible, and improves production efficiency, so as to ensure safe production in tank farms. Provided technical support.

Description of drawings

Figure 1 is a schematic structural diagram of a safety control system suitable for oil storage tank valves;

The system diagram of the working principle of the microprogram controller of the safety control system described in Fig. 2;

Figure 3 is a schematic structural diagram of the overpressure relief valve.

The numbers in the figure are: 1-Tank body, 2-Hand-automatic valve, 3-Overpressure relief valve with activated carbon adsorption layer, 4-Microprogram controller, 5-Smoke alarm, 6-Non-contact measurement Thermometer, 7-flammable gas detector, 8-alarm, 9-fire-fighting liquid spray pipe with sprinkler, 10-transfer pump, 11-fire-fighting foam tank, 12-photovoltaic solar panel, 13-solar controller , 14-battery, 15-internal thread, 16-vent valve wall, 17-spring, 18-vent, 19-activated carbon adsorption layer, 20-sealed end, 21-vented end, 22-fixed end, 23- Male thread, 24-vent tube.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific examples described herein are only used to explain the present invention, but not to limit the present invention.

As shown in Figures 1 and 2, the present invention provides a safety control system suitable for oil storage tank valves, which is characterized by a manual and automatic integrated valve 2 located on the inlet and outlet pipes of the storage tank and an activated carbon adsorption valve located on the top of the storage tank. The activated carbon adsorption layer 19 is located at the outermost side of the air release port 18, which is easy to replace, and is designed to absorb the volatilized oil vapor to prevent fire, explosion and other accidents caused by excessive oil vapor concentration. The safety control system includes a micro-program controller 4, a smoke alarm 5, a non-contact thermometer 6, a combustible gas detector 7, an alarm 8, a photovoltaic solar panel 12, a solar controller 13 and a battery 14, wherein , the equipment smoke alarm 5, non-contact thermometer 6, combustible gas detector 7 are all connected with the input end of the micro-program controller 4, and the hand-automatic integrated valve 2, the alarm 8 and the micro-program controller are all connected 4 is connected to the output terminal, and the storage battery 14 is directly connected to the micro-program controller 4, which is responsible for supplying power in an emergency.

In particular, the safety control system is also equipped with a small single-tank firefighting system, which is characterized by including a firefighting foam tank 11, a transfer pump 10, and a firefighting liquid spray pipe 9 with a spray head, and the transfer pump 10 is connected to the microcomputer. The program controller 4 outputs are connected. Wherein, the front end of the fire-fighting liquid spraying pipe 9 with spray heads can be expanded and contracted at will, which is convenient for flexible liquid spraying, and effectively expands the fire-extinguishing range.

As shown in FIG. 3 , the overpressure vent valve 3 with activated carbon adsorption layer includes a vent end 21 and a fixed end 22 . The fixed end 22 includes an external thread 23 and an air release pipe 24, the outer wall of the air release pipe 24 is provided with an outer thread 23; the air release end 21 includes a cylindrical air release valve wall 16, and the inner wall of the air release valve wall 16 The bottom is provided with an inner thread 15, which is connected with the outer thread 23 in the fixed end 22 to fix the entire overpressure air release valve 3. A spring 17 is installed on the top of the air release valve wall 16, and the bottom of the spring 17 is connected with a sealing end 20. The sealing end 20 is in close contact with the inner wall of the air release valve wall 16 to achieve sealing. A air release port 18 is provided on the upper left side of the air release valve wall 16, and an activated carbon adsorption layer 19 is provided on the outside of the air release port 18.

The working principle of the safety control device provided by the present invention is as follows: the tank body 1 stores crude oil or other petroleum products. Under normal circumstances, the valve can be opened and closed by the manual and automatic integrated valve 2. If the power failure in the tank area, the valve can be manually controlled to open and close. , although it is equipped with photovoltaic solar panels 12 and batteries 14, it is recommended to use it only in emergency conditions such as fire and other accidents that cause power outages. If there is a fire in the tank area, the smoke alarm 5 detects a large fire, or the non-contact thermometer 6 detects that the temperature around the storage tank is too high, or the combustible gas detector 7 detects that the concentration of combustible gas around the storage tank is about to burn When the lower limit is reached, the abnormal information is transmitted to the micro-program controller 4, and the micro-program controller 4 automatically issues an instruction to close the manual-automatic valve 2, and simultaneously issues an alarm through the alarm 8 to remind the on-the-job staff to investigate. If the three sensor indicators do not improve after the manual and automatic valve 2 is closed, the micro-program controller 4 automatically turns on the transfer pump 10, so that the fire-fighting liquid spray pipe 9 sprays the fire-fighting liquid to cool the surrounding of the tank, so as to avoid the expansion of the fire. , to reduce losses.

In particular, the safety control system is also equipped with an overpressure relief valve 3 with an activated carbon adsorption layer, which is installed on the top of the tank body 1 . When an accident such as equipment failure or fire occurs, the pressure in the tank exceeds the normal index, the air release valve 3 is automatically exhausted through the spring 17, and the sealing end 20 of the air release valve 3 is pushed upward by the air pressure, so that the spring 17 shrinks , when the position of the sealing end 20 is higher than the air vent 18, the air starts to deflate, and the volatilized oil vapor will be absorbed by the activated carbon adsorption layer 19. After the gas is discharged, the pressure decreases, and the position of the sealing end 20 gradually decreases. When the position of the sealing end 20 is low When the air vent 18 is re-sealed, the activated carbon adsorption layer 19 is installed on the outermost layer of the air vent 18 for easy replacement.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (4)

1. The utility model provides a safety control system suitable for oil storage tank valve, is including installing the integrative valve of manual automation on storage tank business turn over pipe, its characterized in that: the automatic manual valve is characterized by further comprising a safety control system for monitoring and controlling the opening and closing states of the valve, wherein the safety control system comprises a micro-program controller, an alarm, a smoke alarm, a non-contact temperature measuring instrument and a combustible gas detector, the smoke alarm, the non-contact temperature measuring instrument and the combustible gas detector are respectively connected with the input end of the micro-program controller, and the manual-automatic integrated valve is connected with the output end of the micro-program controller.

2. A safety control system for a storage tank valve as claimed in claim 1, wherein: the safety control system still includes and is equipped with the excessive pressure bleed valve of taking the active carbon adsorption layer at oil storage tank top, when equipment failure or accidents such as conflagration take place and cause tank internal pressure to exceed normal standard, the bleed valve exhausts through the spring is automatic, and this active carbon adsorption layer can absorb probably because factor influences oil steam that volatilizees out such as high temperature, avoids oil steam concentration too high to cause burning or explosion, just the adsorbed layer is installed in the relief port, is convenient for change.

3. A safety control system for a storage tank valve as claimed in claim 1, wherein: the safety control system further comprises a fireproof and explosion-proof photovoltaic solar panel, a solar controller and a storage battery, wherein the photovoltaic solar panel is independently arranged above the storage tank and connected with the storage battery through the solar controller, solar radiation energy is converted into electric energy after sunlight is absorbed, the electric energy is stored in the storage battery through the solar controller, and the storage battery is connected with the micro-program controller and serves as an emergency standby power supply.

4. A safety control system for a storage tank valve as claimed in claim 1, wherein: the safety control system also comprises a small single-tank fire-fighting system, and specifically comprises a fire-fighting foam tank, a transfer pump and a fire-fighting liquid spraying pipeline with a nozzle, wherein the transfer pump is connected with the output end of the micro-program controller, the fire-fighting liquid spraying pipeline with the nozzle is connected with the transfer pump, the front end of the fire-fighting liquid spraying pipeline can be freely stretched, and flexible liquid discharging is facilitated.

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